JP3419061B2 - Bubble generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble generator for generating bubbles in a water tank.

[0002]

2. Description of the Related Art A conventional bubble generator of this type is shown in FIG.
As shown in FIG. 14, a water tank 1, a bubble generator 2 having a water flow pressure reducing means provided in the water tank 1, a circulation pump 3 for circulating the water in the water tank 1, and a bubble ejection device 2 from the discharge side of the circulation pump 3. Return pipe 5 connecting the first outflow pipe 4 piped to the bubble ejection device 2 and the suction side of the circulation pump 3
And an ejector 7 provided on a bypass 6 connecting the suction side and the discharge side of the circulation pump 3, and the circulation pump 3
A first switching means 8 which is provided on the suction side of the circulation pump 3 and switches the suction direction to the circulation pump 3 to the ejector 7 side and the return pipe 5 side; and a suction pipe 9 piped from the upstream side of the switching means 8 to the ejector 7. From the discharge side of the circulation pump 3, the suction pipe opening / closing means 10 provided in the suction pipe 9, the first air introducing means 12 provided through the first air control means 11 for the ejector 7 and the atmosphere. The second outflow pipe 13 connected to the bubble ejecting device 2 and the circulation pump 3
The second switching means 14 for switching the discharge direction from the second forward pipe 13 side and the ejector 7 side, and the second air control means 15 connected to the bubble jetting device 2 were used.

Next, the operation when fine bubbles are generated is shown in FIG.
Will be explained. First, the first switching means 8 is switched to the ejector 7 side, and the second switching means 14 is switched to the ejector 7 side. When the circulation pump 3 is operated in this state, the water discharged from the circulation pump 3 flows through the first outflow pipe 4 and the bypass passage 6. At this time, due to the suction action of the ejector 7, the water in the return pipe 5 is sucked into the ejector 7 via the suction pipe 9. At this time, the air controlled by the first air control means 11 is also the first air introduction means 1
At the same time, it is sucked by the ejector 7 via 2. When water and air are sucked in this way, the pressure on the discharge side of the circulation pump 3 increases, and high-pressure water in which air is dissolved flows from the circulation pump 3 through the bypass passage 6 and the first outflow pipe 4, It is sent to the bubble generator 2. The water sent to the bubble generator 2 is rapidly decompressed by the water flow decompression means, and as a result, fine bubbles are generated and ejected into the water tank 1.

Next, the operation when jet bubbles are generated will be described with reference to FIG. 14. First, the first switching means 8 is on the return pipe 5 side, and the second switching means 14 is on the second outflow pipe 13 side. Can be switched to. When the circulation pump 3 is operated in this state, the water discharged from the circulation pump 3 flows through the second outflow pipe 13, and the water in the return pipe 5 is sucked into the circulation pump 3. At this time, the air controlled by the second air control means 15 is also mixed with water in the bubble generating device 2 to form jet bubbles and jetted into the water tank 1 (Japanese Patent Laid-Open No. 5-13776).
No. 5).

[0005]

However, in the above structure, since the circulation pump, the ejector and the bypass circuit are used to increase the pressure, the performance of the circulation pump itself is the pressure-discharge amount performance at high pressure. It was difficult to suppress the performance variation at high pressure.

Further, there is a problem that the pressure-discharging amount performance cannot be ensured by the ordinary circulation pump depending on the circulation pump which is commercially available.

The present invention solves the above-mentioned problems, and by adjusting the circulating flow rate and pressure of a bypass circuit, a bubble generating device for improving the productivity of high quality products by eliminating the variation in pressure-discharge rate performance at high pressure. The purpose is to provide.

[0008]

In order to solve the above problems, the present invention provides, as a first means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a circulation. A bypass circuit having both ends connected between the discharge side and the suction side of the pump; an ejector provided in the bypass circuit, having a water suction section for inflowing return water from the bath; and a flow path opening / closing means provided in the bypass circuit. A flow rate adjusting means provided in the bypass circuit for adjusting the pressure of the bypass water discharge part by adjusting the flow rate of the bypass circuit, and a bypass water discharge part for discharging the water flowing through the bypass circuit to the bath.

In order to solve the above-mentioned first problem, as a second means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. An ejector having a bypass circuit having both ends connected between the suction sides, a water suction part provided in the bypass circuit for inflowing return water from the bath, a nozzle for discharging the sucked water, and a diffuser for passing the water discharged from the nozzle An ejector having, a flow path opening / closing means provided in the bypass circuit, a pressure adjusting means for adjusting the bypass water discharge part pressure by adjusting the bypass circuit pressure provided in the ejector, and water flowing in the bypass circuit. It consists of a bypass water discharge part that discharges to the bathtub, and the pressure adjusting means is provided on the ejector, and the pressure is adjusted by moving the diffuser with respect to the diffuser. It is obtained by the configuration in that the manner to adjust the nozzle.

In order to solve the above-mentioned first problem, as a third means, a water tank, fine air bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. An ejector having a bypass circuit having both ends connected between the suction sides, a water suction part provided in the bypass circuit for inflowing return water from the bath, a nozzle for discharging the sucked water, and a diffuser for passing the water discharged from the nozzle And a flow path opening / closing means provided in the bypass circuit, a pressure adjusting means for adjusting the bypass water discharge part pressure by adjusting the bypass circuit pressure provided in the ejector, and the water flowing through the bypass circuit is discharged to the bathtub. It consists of a bypass water discharge part and a nozzle with pressure adjusting means provided in the ejector, and a diffuser that is movable with respect to the nozzle to adjust the pressure. Are those that form.

In order to solve the above-mentioned first problem, as a fourth means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. An ejector having a bypass circuit having both ends connected between the suction sides, a water suction part provided in the bypass circuit for inflowing return water from the bath, a nozzle for discharging the sucked water, and a diffuser for passing the water discharged from the nozzle And a flow path opening / closing means provided in the bypass circuit, a pressure adjusting means for adjusting the bypass water discharge part pressure by adjusting the bypass circuit pressure provided in the ejector, and the water flowing through the bypass circuit is discharged to the bathtub. A bypass water discharge part is provided, and the pressure adjusting means is adjusted by the length of the diffuser of the ejector.

In order to solve the above-mentioned first problem, as a fifth means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. A bypass circuit having both ends connected between the suction sides, an ejector having a water suction section provided in the bypass circuit for inflowing return water from the bathtub, and a bypass water discharge section for discharging the water flowing through the bypass circuit to the bathtub, It is composed of a pressure sensor for detecting the pressure of the bypass water discharge unit and a flow rate adjusting means for receiving the signal of the pressure sensor and adjusting the flow rate of the bypass circuit.

Further, in order to solve the above first problem, as a sixth means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. A bypass circuit having both ends connected between the suction sides, an ejector provided in the bypass circuit and having a water suction section for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, and a flow in the bypass circuit It is composed of a bypass water discharger for discharging water to the bath, a pressure sensor for detecting the pressure of the bypass water discharger, and a pump control device for receiving the signal of the pressure sensor and controlling the rotation speed of the circulation pump. .

In order to solve the above-mentioned second problem, as a seventh means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. Between the suction side and the suction side, a bypass circuit, an ejector provided in the bypass circuit having a water suction section for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, It is composed of a return pipe for sending return water to the ejector, a second circulation pump provided in the return pipe, and a bypass water discharge part for discharging the water flowing through the bypass circuit to the bath.

In order to solve the above first problem, as an eighth means, a water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a discharge side of the circulation pump. A bypass circuit having both ends connected between the suction sides, an ejector provided in the bypass circuit and having a water suction section for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, and a return from the bath A return pipe that sends water to the ejector, a second circulation pump provided in the return pipe, a bypass water discharge unit that discharges the water flowing through the bypass circuit to the bathtub, and a pressure sensor that detects the pressure of the bypass water discharge unit. , And a pump control device that receives the signal from the pressure sensor and controls the rotation speed of the second circulation pump.

[0016]

As in the conventional example, when the pump is in operation, the return water from the bathtub is made to flow from the suction pipe to the ejector and is circulated in the bypass circuit, so that the pressure in the bypass passage can be raised by the pressure raising action of the ejector. In this, the discharge pressure and discharge flow rate of the circuit are determined by the ratio of the flow rate circulating in the bypass circuit and the flow rate flowing in the bypass water discharge part, and the pressure on the suction side of the circulation pump.

According to the first aspect of the present invention, in the inspection step after product assembly, the pressure of the bypass water discharge part is measured, and if the pressure is higher than a certain value, the flow path of the flow rate adjusting means provided in the bypass circuit. When the area is increased, the pressure of the bypass water discharge part is increased, and when the pressure is lower than a certain value, the pressure of the bypass water discharge part is decreased when the flow path area is decreased.

Further, the present invention is the pressure adjusting means having the above-mentioned second structure, which measures the pressure of the bypass water discharge part in the inspection step after the product is assembled and is provided in the ejector if the pressure is higher than a certain value. When the distance between the ejector nozzle and the diffuser is reduced by changing the position of the diffuser, the pressure in the bypass water discharge part rises, and if the pressure is lower than a certain value, the distance is increased and the bypass water discharge part The pressure drops.

Further, according to the third aspect of the present invention, the pressure adjusting means provided in the ejector for measuring the pressure of the bypass water discharge part in the inspection step after the product is assembled and if the pressure is higher than a certain value. If the distance between the ejector nozzle and the diffuser is changed by changing the nozzle position, the pressure in the bypass water discharge part rises, and if the pressure is lower than a certain value, the distance is increased to increase the bypass water discharge part. The pressure drops.

Further, according to the fourth aspect of the present invention, the pressure adjusting means provided in the ejector measures the pressure of the bypass water discharge part in the inspection step after the product is assembled and if the pressure is higher than a certain value. If the length of the ejector diffuser is increased, the pressure in the bypass water discharge part will rise, and if the pressure is lower than a certain value, the length will be shortened.
The pressure in the bypass water discharge section drops.

According to the fifth aspect of the present invention, the pressure of the bypass water discharge portion is detected, and if the pressure is higher than a certain value, the flow passage area of the flow rate adjusting means provided in the bypass circuit is increased. A signal is sent, and if the pressure is lower than a certain value, a signal is sent so as to reduce the flow passage area, and the flow passage area is changed.

According to the sixth aspect of the present invention, the pressure of the bypass water discharge portion is detected, and if the pressure is higher than a certain value, the rotation speed of the circulation pump is reduced to reduce the circulation amount of the bypass circuit. Reduce the pressure of the bypass water discharge part. If the pressure is lower than a certain value, the rotation speed is increased to increase the circulation amount in the bypass circuit to increase the pressure in the bypass water discharge part.

According to the seventh aspect of the present invention, the water discharged from the second circulation pump is sent from the suction pipe to the first circulation pump. At this time, the pressure on the suction side of the first circulation pump is higher than when the second circulation pump is not operated. The pressure on the discharge side of the first circulation pump rises as much as the pressure on the suction side of the first circulation pump rises, and accordingly the pressure in the bypass circuit and the pressure in the bypass water discharge portion rise.

Further, according to the eighth aspect of the present invention, the pressure of the bypass water discharge portion is detected, and if the pressure is higher than a certain value, the rotation speed of the second circulation pump is reduced to reduce the circulation amount of the bypass circuit. Reduce the pressure of the bypass water discharge part. If the pressure is lower than a certain value, the rotation speed is increased to increase the circulation amount in the bypass circuit to increase the pressure in the bypass water discharge part.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first invention will be described below with reference to the accompanying drawings. In FIG. 1 and FIG. 2, 16 is a circulation pump, and a feed pipe 19 is connected from the circulation pump 16 to the fine bubble generating means 18 provided in the bath 17. Further, the feed pipe 19 has a check valve A2 as a check means.
0, a gas-liquid mixing pipe 21 which is a gas-liquid mixing means is provided. On the other hand, a bypass circuit 23 is provided between the discharge side and the suction side of the circulation pump 16 via the ejector 22.
Further, the bypass circuit 23 includes a two-way valve 2 as a bypass opening / closing means.
4, and a flow rate adjusting valve 25 for changing the flow rates of the bypass circuit 23. Negative pressure portion 2 of ejector 22
A suction pipe 28 connects the 6 and the three-way valve 27, which is a switching means arranged on the suction side of the circulation pump 16.

Further, the negative pressure portion 26 of the ejector 22 and the atmosphere are provided with a check valve B29 which is a check means, a constant flow governor 30 which is a pressure control means, and an air introduction means which is an electromagnetic valve A31. Further, an outflow pipe 33 is piped from the circulation pump 16 to a jet bubble ejecting means 34 provided in the bath 17 through a two-way valve 32 which is an opening / closing means.

An air pipe 35 is provided to the jet bubble jetting means 34 via an electromagnetic valve B36. 37 is an arrow indicating the flow of fluid, 38 is a fine bubble, and 39 is a jet bubble. Reference numeral 40 is a return pipe that is piped from the bathtub 17 to the circulation pump 16.

Next, the operation of the first invention will be described with reference to FIGS. The operation when the fine bubbles are generated will be described with reference to FIG. 1. When the circulation pump 16 is operated in the state of FIG. 1, the warm water discharged from the circulation pump 16 flows into the bypass circuit 23 and also passes through the bypass water discharge unit 41, It flows to the feed pipe 19. At this time, due to the suction action of the ejector 22, the warm water in the return pipe 40 is sucked into the ejector 22 via the suction pipe 28. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 16 increases and the pressure on the discharge side of the circulation pump 16 also increases, so that high-pressure hot water from the circulation pump 16 is passed through the bypass circuit 23 and the feed pipe 19. Sent to. At this time, the electromagnetic valve A31 is opened, and the air is sucked into the ejector 22 through the constant flow governor 30 and the check valve B29 which is the check means. Furthermore, the ejector 22
The air sucked in and the hot water flowing through the feed pipe 19 pass through a check valve A29 which is a check means, are pressure-melted in a gas-liquid mixing tube 21 which is a gas-liquid mixing means, and are fed to the fine bubble generating means 18. Sent. The hot water sent to the fine air bubble generating means 18 is rapidly depressurized by being jetted from a fine cross section flow path (not shown). As a result, the air that has been dissolved at the time of high pressure is decompressed and becomes fine bubbles that are ejected into the bath 17. At this time, if the flow path of the flow rate adjusting valve 25 provided in the bypass circuit 23 is enlarged, the piping resistance of the bypass circuit 23 is reduced, so that a large amount of water circulates in the bypass circuit 23. Therefore, the bypass circuit 2 by the ejector 22
The effect of increasing the pressure in 3 is increased, and the pressure of the bypass water discharger 41 is increased. Further, if the flow path of the flow rate adjusting valve 25 provided in the bypass circuit 23 is made small, the pipe resistance of the bypass circuit 23 increases, so that the circulation amount of water in the bypass circuit 23 decreases. Therefore, the ejector 2
2 reduces the boosting effect in the bypass circuit 23,
The pressure of the bypass water discharge part 41 becomes low. As a result, the pressure of the bypass water discharger 41 can be changed. Further, the performance adjustment at the time of assembling the product can be easily performed only by finely adjusting the flow rate adjusting valve 25.

Further, since the check valve A20 which is the check means is provided in the upstream portion of the gas-liquid mixing tube 21 which is the gas-liquid mixing means, the pump 16 is stopped and the pressures of the feed pipe 33 and the pump 16 are reduced. Even if the temperature drops, the hot water in which the air is melted under pressure is sent to the bathtub 17 side without backflowing through the feed pipe 19, and the air appearing in the feed pipe 19 is also discharged to the bathtub 17 side together with the hot water.
Air is unlikely to collect in the pump 16. Therefore, when the pump 16 is operated again, air is not caught,
It is possible to operate the pump 16 immediately. In the operation for generating fine bubbles, the pressure of the negative pressure portion 26 of the ejector 22 is configured to be always constant by the action of the constant flow governor 30 even if the installation height of the circulation pump 16 changes with respect to the water tank 17. . Moreover, even if the pressure of the negative pressure portion 28 becomes higher than the atmospheric pressure, the low flow rate is prevented from flowing back to the vane 30. For this reason, air is immediately sucked in to enable pressure dissolution. Therefore, the amount of air sucked into the ejector 22 from the air introduction unit including the check valve B29, which is the check unit, the constant flow governor 30, and the electromagnetic valve A31 is stably supplied at a constant amount.

Next, the operation when the large bubbles are jetted will be described with reference to FIG. When the circulation pump 16 is operated in FIG. 2, the warm water discharged from the circulation pump 16 is fed through the two-way valve 32 to the feed pipe 3
3 is sent to the jet bubble jetting means 34. The sent hot water is jetted from the jet bubble jetting means 34 to the bathtub 17. Due to the negative pressure due to the water flow at this time, the air is sucked through the solenoid valve 36 and the air pipe 35 to be jet bubbles and jetted into the bath 17. Circulation pump 1 at this time
Part of the hot water discharged from 6 flows to the feed pipe 19.

An embodiment of the second invention will be described with reference to the accompanying drawings. In FIGS. 3 to 4, reference numeral 16 is a circulation pump, and a feed pipe 19 is connected from the circulation pump 16 to the fine bubble generating means 18 provided in the bath 17. Further, the feed pipe 19 has a check valve A20 as a check means,
A gas-liquid mixing pipe 21 which is a gas-liquid mixing means is arranged.
On the other hand, a bypass circuit 23 is provided between the discharge side and the suction side of the circulation pump 16 via the ejector 22. The bypass circuit 23 is provided with a two-way valve 24 as a bypass opening / closing means. A negative pressure portion 26 of the ejector 22 and a three-way valve 27, which is a switching means arranged on the suction side of the circulation pump 16, are connected by a suction pipe 28. Further, the ejector 22 includes a nozzle portion 22-1, a diffuser portion 22-2, a water suction portion 22-3, an air suction portion 22-4, a bypass circuit connection port A22-5, and a bypass circuit connection port B22. -6 and distance adjusting means 22-7. Nozzle part 22-1 and diffuser part 2
The distance adjusting means 22-7 with respect to 2-2 is provided as pressure adjusting means 42 for adjusting the pressure of the bypass water discharge part.

Further, the negative pressure portion 26 of the ejector 22 and the atmosphere are provided with a check valve B29 which is a check means, a constant flow governor 30 which is a pressure control means, and an air introduction means which is an electromagnetic valve A31. Further, an outflow pipe 33 is piped from the circulation pump 16 to a jet bubble ejecting means 34 provided in the bath 17 through a two-way valve 32 which is an opening / closing means.

An air pipe 35 is provided to the jet bubble jetting means 34 via an electromagnetic valve B36. 37 is an arrow indicating the flow of fluid, 38 is a fine bubble, and 39 is a jet bubble. Reference numeral 40 is a return pipe that is piped from the bathtub 17 to the circulation pump 16.

Next, the operation of the second invention will be described with reference to FIGS. The operation when the fine bubbles are generated will be described with reference to FIG. 3. When the circulation pump 16 is operated in the state of FIG. 3, the hot water discharged from the circulation pump 16 flows into the bypass circuit 23 and also passes through the bypass water discharge unit 41, It flows to the feed pipe 19. At this time, due to the suction action of the ejector 22, the warm water in the return pipe 40 is sucked into the ejector 22 via the suction pipe 28. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 16 increases and the pressure on the discharge side of the circulation pump 16 also increases, so that high-pressure hot water from the circulation pump 16 is passed through the bypass circuit 23 and the feed pipe 19. Sent to. At this time, the electromagnetic valve A31 is opened, and the air is sucked into the ejector 22 through the constant flow governor 30 and the check valve B29 which is the check means. Furthermore, the ejector 22
The air sucked in and the hot water flowing through the feed pipe 19 pass through a check valve A29 which is a check means, are pressure-melted in a gas-liquid mixing tube 21 which is a gas-liquid mixing means, and are fed to the fine bubble generating means 18. Sent. The hot water sent to the fine air bubble generating means 18 is rapidly depressurized by being jetted from a fine cross section flow path (not shown). As a result, the air that has been dissolved at the time of high pressure is decompressed and becomes fine bubbles that are ejected into the bath 17. At this time, the ejector 22 adjusts the position of the nozzle portion 22-2 with respect to the diffuser portion 22-1 by the distance adjusting means 22-7 and shortens the distance, so that the water from the suction pipe 28 to the water suction portion 22-3 is absorbed. The amount of suction increases. For this reason, a lot of water circulates in the bypass circuit 23,
The boosting effect in the bypass circuit 23 is increased, and the pressure of the bypass water discharger 41 is increased. Also, the distance adjusting means 2
By adjusting the position with 2-7 and increasing the distance, the amount of water suctioned from the suction pipe 28 to the water suction portion 22-3 is reduced. Therefore, the circulation amount of water in the bypass circuit 23 is reduced. Therefore, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is reduced, and the pressure of the bypass water discharger 41 is reduced. As a result, the pressure of the bypass water discharger 41 can be changed. Further, by integrating the pressure adjusting means 42 with the ejector 22, the cost can be reduced.

Further, since the check valve A20 which is a check means is provided in the upstream portion of the gas-liquid mixing tube 21 which is a gas-liquid mixing means, the pump 16 is stopped and the pressures of the feed pipe 33 and the pump 16 are reduced. Even if the temperature drops, the hot water obtained by pressurizing and dissolving the air is sent to the bathtub 17 side without flowing backward in the feed pipe 19, and the air appearing in the feed pipe 19 is also discharged to the bathtub 17 side together with the hot water, and the air is pumped in the pump 16. Is hard to collect. Therefore, when the pump 16 is operated again, it is possible to immediately operate the pump 16 without causing air trapping. In the operation for generating fine bubbles, the pressure of the negative pressure portion 26 of the ejector 22 is configured to be always constant by the action of the constant flow governor 30 even if the installation height of the circulation pump 16 changes with respect to the water tank 17. . Moreover, even if the pressure of the negative pressure portion 28 becomes higher than the atmospheric pressure, the low flow rate is prevented from flowing back to the vane 30. For this reason, air is immediately sucked in to enable pressure dissolution. Therefore, the amount of air sucked into the ejector 22 from the air introduction unit including the check valve B29, which is the check unit, the constant flow governor 30, and the electromagnetic valve A31 is stably supplied at a constant amount.

The operation at the time of jetting a large bubble is the same as in the first aspect of the invention, and therefore will be omitted. An embodiment of the third invention will be described with reference to the accompanying drawings. In FIG.
The ejector 22B includes a nozzle portion 22B-1, a diffuser portion 22B-2, a water suction portion 22B-3,
Air suction part 22B-4 and bypass circuit connection port A2
2B-5, the bypass circuit connection port B22B-6, the distance adjusting means 22B-7, the diffuser portion 22B-2 and the outer cylinder portion 22B-8 for moving the nozzle portion 22B-1.
It consists of The distance adjusting means 22-7B between the nozzle portion 22-1B and the diffuser portion 22-2B is provided as pressure adjusting means 42B for adjusting the pressure of the bypass water discharge portion.

Next, the operation of the third invention will be described with reference to FIG. Diffuser part 22- of the ejector 22B
1B, the nozzle unit 22-2B and the distance adjusting means 22-
By adjusting the position with 7B and shortening the distance, the suction tube 2
The amount of water sucked from No. 8 to the water suction section 22-3B increases. For this reason, a large amount of water circulates in the bypass circuit 23, the boosting effect in the bypass circuit 23 increases, and the pressure of the bypass water discharger 41 increases. In addition, by adjusting the position with the distance adjusting means 22-7B and increasing the distance, the water suction part 22-3B is drawn from the suction pipe 28.
The amount of water sucked into is reduced. Therefore, the circulation amount of water in the bypass circuit 23 is reduced. Therefore, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is reduced, and the pressure of the bypass water discharger 41 is reduced. As a result, the pressure of the bypass water discharger 41 can be changed. Other than the above, it is the same as the embodiment of the second invention, and therefore omitted.

An embodiment of the fourth invention will be described with reference to the accompanying drawings. In FIG. 6, the ejector 22C
Is the nozzle portion 22-1C and the diffuser portion 22-2.
C and water suction section 22-3C and air suction section 22-
4C, bypass circuit connection port A22-5C, bypass circuit connection port B22-6C, and diffuser section 22-2.
It is composed of a spacer 22-8C for adjusting the length of C. Nozzle part 22-1C and diffuser part 22-2
The distance adjusting means 22-7C from C is provided as pressure adjusting means 42C for adjusting the pressure of the bypass water discharge part.

Next, the operation of the fourth invention will be described with reference to FIG. A spacer 22- which is a diffuser distance adjusting means provided in the diffuser portion 22-2C.
By increasing the length of the diffuser at 7C, the pressure at the bypass circuit connection port 22-6 increases. Therefore, the boosting effect in the bypass circuit 23 is increased, and the pressure of the bypass water discharger 41 is increased. In addition, by shortening the length of the diffuser with a spacer 22-7C, which is a distance adjusting means of the diffuser provided in the diffuser portion 22-2C, the bypass circuit connection port 22
The pressure at -6 becomes smaller. Therefore, the bypass circuit 2
The boosting effect in 3 becomes small, and the pressure of the bypass water discharge part 41 becomes low. As a result, the bypass water discharger 41
The pressure of can be changed. Other than the above, it is the same as the embodiment of the second invention, and therefore omitted. The operation at the time of ejecting a large bubble is also the same as in the first aspect of the present invention, and therefore will be omitted.

Next, an embodiment of the fifth invention will be described with reference to the accompanying drawings. In FIG. 7 and FIG. 8, 16 is a circulation pump, and a feed pipe 19 is connected from the circulation pump 16 to the fine bubble generating means 18 provided in the bath 17. Further, the feed pipe 19 has a check valve A2 as a check means.
0, a gas-liquid mixing pipe 21 which is a gas-liquid mixing means is provided. On the other hand, a bypass circuit 23 is provided between the discharge side and the suction side of the circulation pump 16 via the ejector 22.
Further, the bypass circuit 23 is provided with a flow rate adjusting valve 43 for adjusting the bypass flow rate and a pressure sensor 44 for detecting the pressure of the feed pipe 19. A negative pressure portion 26 of the ejector 22 and a three-way valve 27, which is a switching means arranged on the suction side of the circulation pump 16, are connected by a suction pipe 28.

Further, the negative pressure portion 26 of the ejector 22 and the atmosphere are provided with a check valve B29 which is a check means, a constant flow governor 30 which is a pressure control means, and an air introduction means which is an electromagnetic valve A31. Further, an outflow pipe 33 is piped from the circulation pump 16 to a jet bubble ejecting means 34 provided in the bath 17 through a two-way valve 32 which is an opening / closing means.

An air pipe 35 is provided to the jet bubble jetting means 34 via an electromagnetic valve B36. 37 is an arrow indicating the flow of fluid, 38 is a fine bubble, and 39 is a jet bubble. Reference numeral 40 is a return pipe that is piped from the bathtub 17 to the circulation pump 16.

Next, the operation of the fifth invention will be described with reference to FIGS. The operation when the fine bubbles are generated will be described with reference to FIG. 7. When the circulation pump 16 is operated in the state shown in FIG. 7, the warm water discharged from the circulation pump 16 flows into the bypass circuit 23 and also passes through the bypass water discharger 41, It flows to the feed pipe 19. At this time, due to the suction action of the ejector 22, the warm water in the return pipe 40 is sucked into the ejector 22 via the suction pipe 28. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 16 increases and the pressure on the discharge side of the circulation pump 16 also increases, so that high-pressure hot water from the circulation pump 16 is passed through the bypass circuit 23 and the feed pipe 19. Sent to. At this time, the electromagnetic valve A31 is opened, and the air is sucked into the ejector 22 through the constant flow governor 30 and the check valve B29 which is the check means. Furthermore, the ejector 22
The air sucked in and the hot water flowing through the feed pipe 19 pass through a check valve A29 which is a check means, are pressure-melted in a gas-liquid mixing tube 21 which is a gas-liquid mixing means, and are fed to the fine bubble generating means 18. Sent. The hot water sent to the fine air bubble generating means 18 is rapidly depressurized by being jetted from a fine cross section flow path (not shown). As a result, the air that has been dissolved at the time of high pressure is decompressed and becomes fine bubbles that are ejected into the bath 17. At this time, when the pressure in the feed pipe becomes lower than the pressure set in the pressure sensor, the flow path of the flow rate adjusting valve 43 provided in the bypass circuit 23 is enlarged. By reducing the piping resistance of the bypass circuit 23, a large amount of water circulates in the bypass circuit 23. Therefore, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is increased, and the pressure of the bypass water discharger 41 is increased. Further, when the pressure in the feed pipe becomes higher than the pressure set in the pressure sensor, the flow passage of the flow rate adjusting valve 43 provided in the bypass circuit 23 becomes smaller. By increasing the piping resistance of the bypass circuit 23, the circulation amount of water in the bypass circuit 23 decreases. Therefore, the bypass circuit 2 by the ejector 22
The boosting effect in 3 becomes small, and the pressure of the bypass water discharge part 41 becomes low. As a result, the bypass water discharger 41
The pressure of can be changed. Further, since the flow rate adjusting valve 43 automatically performs fine adjustment based on the signal of the pressure sensor 44, it is not necessary to adjust the performance at the time of assembling the product, and also the installation condition can be widened depending on the height of the bathtub and the pump at the time of installation. Further, since the check valve A20 which is the check means is provided in the upstream portion of the gas-liquid mixing pipe 21 which is the gas-liquid mixing means,
Even if the pump 16 is stopped and the pressures of the feed pipe 33 and the pump 16 are reduced, the hot water pressurized and dissolved in the air is sent to the bathtub 17 side without backflow through the feed pipe 19, and the air appearing in the feed pipe 19 is also removed. The pump 16 is discharged to the bathtub 17 side together with the warm water.
It is difficult for air to collect inside. For this, pump 16 again
It is possible to immediately operate the pump 16 without causing air biting when operating. In the operation of generating fine bubbles, the ejector 2 is operated by the function of the constant flow governor 30.
The pressure of the second negative pressure portion 26 is configured so as to be always constant even if the installation height of the circulation pump 16 changes with respect to the water tank 17. Moreover, even if the pressure of the negative pressure portion 28 becomes higher than the atmospheric pressure, the low flow rate is prevented from flowing back to the vane 30. For this reason, air is immediately sucked in to enable pressure dissolution. Therefore, the check valve B2 which is the check means.
The amount of air sucked into the ejector 22 from the air introduction unit including the constant flow rate governor 30 and the electromagnetic valve A31 is stably supplied at a constant amount.

Next, the operation when the large bubbles are jetted will be described with reference to FIG. When the circulation pump 16 is operated in FIG. 8, the hot water discharged from the circulation pump 16 flows through the two-way valve 32, the feed pipe 33, and is sent to the jet bubble jetting means 34. The sent hot water is jetted from the jet bubble jetting means 34 to the bathtub 17. Due to the negative pressure due to the water flow at this time, the air is sucked through the solenoid valve 36 and the air pipe 35 to be jet bubbles and jetted into the bath 17. At this time, part of the hot water discharged from the circulation pump 16 flows into the feed pipe 19.

Next, one embodiment of the sixth invention will be described with reference to the accompanying drawings. In FIGS. 9 and 10, 16 is a circulation pump, and a feed pipe 19 is connected from the circulation pump 16 to the fine bubble generating means 18 provided in the bath 17. Further, the feed pipe 19 has a check valve A2 as a check means.
0, a gas-liquid mixing pipe 21 which is a gas-liquid mixing means is provided. On the other hand, a bypass circuit 23 is provided between the discharge side and the suction side of the circulation pump 16 via the ejector 22.
Further, the bypass circuit 23 is provided with a flow rate adjusting valve 43 for adjusting the bypass flow rate and a pressure sensor 44 for detecting the pressure of the feed pipe 19. Further, the pressure sensor 44 is provided with control means 45 for controlling the rotation speed of the circulation pump 16. Further, the negative pressure portion 26 of the ejector 22 and a three-way valve 27, which is a switching means arranged on the suction side of the circulation pump 16, are connected by a suction pipe 28. The negative pressure portion 26 of the ejector 22 and the atmosphere are a check valve B which is a check means.
29, constant flow governor 30 as pressure control means, solenoid valve A
An air introduction unit consisting of 31 is provided. Further, an outflow pipe 33 is piped from the circulation pump 16 to a jet bubble ejecting means 34 provided in the bath 17 through a two-way valve 32 which is an opening / closing means. Also, the jet bubble ejecting means 34
Is provided with an air pipe 35 via a solenoid valve B36. 37 is an arrow indicating the flow of fluid, 38 is a fine bubble, 3
9 indicates jet bubbles. Reference numeral 40 is a return pipe that is piped from the bathtub 17 to the circulation pump 16.

Next, the operation of the sixth invention will be described with reference to FIGS. The operation when the fine bubbles are generated will be described with reference to FIG. 9. When the circulation pump 16 is operated in the state shown in FIG. 9, the hot water discharged from the circulation pump 16 flows into the bypass circuit 23 and also passes through the bypass water discharge unit 41, It flows to the feed pipe 19. At this time, due to the suction action of the ejector 22, the warm water in the return pipe 40 is sucked into the ejector 22 via the suction pipe 28. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 16 increases and the pressure on the discharge side of the circulation pump 16 also increases, so that high-pressure hot water from the circulation pump 16 is passed through the bypass circuit 23 and the feed pipe 19. Sent to. At this time, the electromagnetic valve A31 is opened, and the air is sucked into the ejector 22 through the constant flow governor 30 and the check valve B29 which is the check means. Furthermore, the ejector 22
The air sucked in and the hot water flowing through the feed pipe 19 pass through a check valve A29 which is a check means, are pressure-melted in a gas-liquid mixing tube 21 which is a gas-liquid mixing means, and are fed to the fine bubble generating means 18. Sent. The hot water sent to the fine air bubble generating means 18 is rapidly depressurized by being jetted from a fine cross section flow path (not shown). As a result, the air that has been dissolved at the time of high pressure is decompressed and becomes fine bubbles that are ejected into the bath 17. At this time, when the pressure of the feed pipe becomes lower than the pressure set in the pressure sensor, the rotation speed control means 45 of the circulation pump 16 operates to increase the rotation speed of the circulation pump 16. As a result, a large amount of water circulates in the bypass circuit 23. Therefore, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is increased, and the pressure of the bypass water discharger 41 is increased. Further, when the pressure of the feed pipe becomes higher than the pressure set in the pressure sensor, the rotation speed control means 45 of the circulation pump 16 operates to reduce the rotation speed of the circulation pump 16. As a result, the circulation amount of water in the bypass circuit 23 is reduced. Therefore, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is reduced, and the pressure of the bypass water discharger 41 is reduced. As a result, the pressure of the bypass water discharger 41 can be changed. Further, since the flow rate adjusting valve 43 automatically performs fine adjustment based on the signal of the pressure sensor 44, it is not necessary to adjust the performance at the time of assembling the product, and also the installation condition can be widened depending on the height of the bathtub and the pump at the time of installation.
Further, since the check valve A20 which is the check means is provided in the upstream portion of the gas-liquid mixing tube 21 which is the gas-liquid mixing means, the pump 16 is stopped and the pressures of the feed pipe 33 and the pump 16 are lowered. Also, the hot water obtained by pressurizing and dissolving the air is sent to the bathtub 17 side without backflowing through the feed pipe 19, and the air appearing in the feed pipe 19 is also discharged to the bathtub 17 side together with the hot water, and the air is less likely to accumulate in the pump 16. . For this reason, when the pump 16 is operated again, air is not caught and the pump 1
It is possible to drive 6. In the operation of generating fine bubbles, the pressure of the negative pressure portion 26 of the ejector 22 is set by the constant flow rate governor 30 so that the installation height of the circulation pump 16 is equal to that of the water tank 1.
Even if the pressure of the negative pressure portion 28 becomes higher than the atmospheric pressure, the low flow rate is prevented from flowing back to the vane 30. For this reason, air is immediately sucked in to enable pressure dissolution. Therefore, the amount of air sucked into the ejector 22 from the air introduction unit including the check valve B29, which is the check unit, the constant flow governor 30, and the electromagnetic valve A31 is stably supplied at a constant amount.

Next, the operation when a large bubble is jetted will be described with reference to FIG. When the circulation pump 16 is operated in FIG. 10,
The hot water discharged from the circulation pump 16 flows through the feed pipe 33 via the two-way valve 32 and is sent to the jet bubble jetting means 34. The sent hot water is jetted from the jet bubble jetting means 34 to the bathtub 17. Due to the negative pressure due to the water flow at this time, the air is sucked through the solenoid valve 36 and the air pipe 35 to be jet bubbles and jetted into the bath 17. At this time, part of the hot water discharged from the circulation pump 16 flows into the feed pipe 19.

Next, one embodiment of the seventh and eighth inventions will be described with reference to the accompanying drawings. 9 and 10, 1
A circulation pump 6 is provided with a feed pipe 19 from the circulation pump 16 to the fine bubble generating means 18 provided in the bath 17. Further, the feed pipe 19 is provided with a check valve A20 as a check means and a gas-liquid mixing pipe 21 as a gas-liquid mixing means. On the other hand, a bypass circuit 23 is provided between the discharge side and the suction side of the circulation pump 16 via the ejector 22. Further, the bypass circuit 23 is provided with a two-way valve 24 that opens and closes the bypass circuit 23 and a pressure sensor 44 that detects the pressure of the feed pipe 19. Further, from the pressure sensor 44, a control means 46 for controlling the rotation speed of the second circulation pump 47 is provided. In addition, the negative pressure portion 2 of the ejector 22
A suction pipe 28 connects the 6 and the three-way valve 27, which is a switching means arranged on the suction side of the circulation pump 16. The negative pressure portion 26 of the ejector 22 and the atmosphere are a check valve B29 which is a check means and a constant flow governor 3 which is a pressure control means.
0, an air introduction means including a solenoid valve A31 is provided. Further, from the circulation pump 16, a two-way valve 3 which is an opening / closing means.
The outflow pipe 33 is connected to the jet bubble ejecting means 34 provided in the bathtub 17 via the line 2. An air pipe 35 is provided to the jet bubble ejecting means 34 via an electromagnetic valve B36. 37 is an arrow indicating the flow of fluid, 38 is a fine bubble, and 39 is a jet bubble. Reference numeral 40 is a return pipe that is piped from the bathtub 17 to the circulation pump 16. Further, the return pipe 40 is provided with a second circulation pump 47.

Next, the operation in the seventh and eighth inventions is shown in FIG.
1 to 12 will be described. The operation when fine bubbles are generated will be described with reference to FIG. 11. In the state shown in FIG.
When the engine is operated, the hot water discharged from the circulation pump 16 flows into the bypass circuit 23, the bypass water discharge unit 41, and the feed pipe 19. At this time, due to the suction action of the ejector 22, the warm water in the return pipe 40 is sucked into the ejector 22 via the suction pipe 28. When hot water is sucked in this way, the pressure on the suction side of the circulation pump 16 increases and the pressure on the discharge side of the circulation pump 16 also increases, so that high-pressure hot water from the circulation pump 16 flows to the bypass circuit 23 and the feed pipe 19. Is sent. At this time, the solenoid valve A31 is opened, and the air is supplied with a constant flow rate governor 30 and a check valve B as a check means.
It is sucked by the ejector 22 via 29. Further, the air sucked by the ejector 22 and the warm water flowing through the feed pipe 19 pass through the check valve A29 which is a check means, are pressure-melted in the gas-liquid mixing tube 21 which is a gas-liquid mixing means, and are the fine bubble generating means. Sent to 18. The hot water sent to the fine air bubble generating means 18 is rapidly depressurized by being jetted from a fine cross section flow path (not shown). As a result, the air that has been dissolved at the time of high pressure is decompressed and becomes fine bubbles that are ejected into the bath 17. At this time, when the pressure of the feed pipe becomes lower than the pressure set in the pressure sensor, the rotation speed control means 46 of the second circulation pump 47 operates to increase the rotation speed of the second circulation pump 47. As a result, the pressure in the negative pressure portion 26 of the ejector 22, which is the lowest pressure in the bypass circuit 23, rises. As a result, the effect of increasing the pressure in the bypass circuit 23 by the ejector 22 is increased, and the pressure of the bypass water discharger 41 is increased. When the pressure in the feed pipe becomes higher than the pressure set in the pressure sensor, the rotation speed control means 46 of the second circulation pump 47 operates to reduce the rotation speed of the second circulation pump 47. As a result, the pressure in the negative pressure portion 26 of the ejector 22, which is the lowest pressure in the bypass circuit 23, drops. As a result, the boosting effect of the ejector 22 in the bypass circuit 23 is reduced, and the pressure of the bypass water discharger 41 is reduced. As a result, the pressure of the bypass water discharger 41 can be changed. In addition, the flow rate adjustment valve 4 is automatically
Since 3 is finely adjusted by the signal of the pressure sensor 44, it is not necessary to adjust the performance at the time of assembling the product, and at the time of installation, the installation conditions can be widened depending on the height of the bathtub and the pump. Further, since the check valve A20 which is the check means is provided in the upstream portion of the gas-liquid mixing pipe 21 which is the gas-liquid mixing means, the pump 1
Even if 6 is stopped and the pressures of the feed pipe 33 and the pump 16 are lowered, the hot water pressurized and dissolved in the air is sent to the bathtub 17 side without backflowing through the feed pipe 19, and the air appearing in the feed pipe 19 is also hot water. At the same time, the air is discharged to the bath 17 side, and the air is unlikely to be accumulated in the pump 16. Therefore, when the pump 16 is operated again, it is possible to immediately operate the pump 16 without causing air trapping. In the operation for generating fine bubbles, the pressure of the negative pressure portion 26 of the ejector 22 is configured to be always constant by the action of the constant flow governor 30 even if the installation height of the circulation pump 16 changes with respect to the water tank 17. Moreover, even if the pressure of the negative pressure portion 28 becomes higher than the atmospheric pressure, the low flow rate is prevented from flowing back to the vane 30. For this reason, air is immediately sucked in to enable pressure dissolution. Therefore, the amount of air sucked into the ejector 22 from the air introduction unit including the check valve B29, which is the check unit, the constant flow governor 30, and the electromagnetic valve A31 is stably supplied at a constant amount.

Next, the operation when a large bubble is jetted will be described with reference to FIG. When the circulation pump 16 is operated in FIG. 12,
The hot water discharged from the circulation pump 16 flows through the feed pipe 33 via the two-way valve 32 and is sent to the jet bubble jetting means 34. The sent hot water is jetted from the jet bubble jetting means 34 to the bathtub 17. Due to the negative pressure due to the water flow at this time, the air is sucked through the solenoid valve 36 and the air pipe 35 to be jet bubbles and jetted into the bath 17. At this time, part of the hot water discharged from the circulation pump 16 flows into the feed pipe 19.

[0051]

As described above, according to the bubble generating apparatus of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the pressure of the bypass water discharge part can be adjusted to a constant value by adjusting the flow rate of the bypass circuit during the product inspection process due to variations in product performance.

According to the second aspect of the present invention, the pressure in the bypass water discharge portion can be adjusted to a constant value by adjusting the pressure in the bypass circuit by the ejector during the product inspection process due to the variation in product performance. In addition, adjustment is possible without increasing the number of parts.

According to the third aspect of the present invention, the pressure in the bypass water discharge portion can be adjusted to a constant value by adjusting the pressure in the bypass circuit by the ejector during the product inspection process due to the variation in product performance. In addition, adjustment is possible without increasing the number of parts. Further, since the nozzle is rotated to adjust the distance from the diffuser, it can be easily adjusted from the outside even after assembly.

According to the fourth aspect of the present invention, the variation of the performance of the product can be suppressed at a low cost by adjusting the pressure adjusting means during the product inspection process. Further, since the distance between the nozzle of the ejector and the diffuser is not changed, the nozzle position and the position of the ejector suction portion do not change, and the adjustment can be easily performed because only a single factor can be used for adjustment.

According to the fifth aspect of the present invention, the pressure sensor detects the pressure in the bypass circuit discharge section, and even if the pressure becomes a value other than the constant pressure, the flow rate in the bypass circuit is automatically adjusted to maintain the constant discharge. The pressure and flow rate can be secured. Therefore, no adjustment process is required when assembling the product.

According to the sixth aspect of the present invention, with the above-described structure, the rotational speed of the first circulation pump is automatically controlled even when the pressure in the bypass circuit discharge section is detected to be other than a certain pressure by the pressure sensor. By adjusting the flow rate of the bypass circuit, a constant discharge pressure and flow rate can be secured. Further, even when the user uses the pump, the rotational speed of the pump can be set to zero to suppress the pressure increase even when an abnormal pressure state occurs.

According to the seventh invention, since the first circulation pump and the second circulation pump are provided by the above-mentioned constitution, the pressure of the bypass water discharge part which is the limit in the first circulation pump can be increased. it can. In addition, by moving the first circulation pump and the second circulation pump even after the water is put in the bathtub, the air in the pipe can be quickly eliminated and the operation of generating bubbles becomes faster.

According to the eighth aspect of the present invention, the pressure sensor detects the pressure of the bypass water discharge portion, so that the rotational speed of the second circulation pump is automatically controlled even when the pressure is not constant. By adjusting the flow rate of the suction circuit, a constant discharge pressure and flow rate can be secured.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a state when fine bubbles are generated in a bubbly water flow generator according to a first embodiment of the present invention.

FIG. 2 is a system configuration diagram showing a state of the apparatus when jet bubbles are generated.

FIG. 3 is a system configuration diagram showing a state when fine bubbles are generated in the bubbly water flow generator according to the second embodiment of the present invention.

FIG. 4 is a configuration diagram of pressure adjusting means in a second embodiment of the same device.

FIG. 5 is a configuration diagram of pressure adjusting means in a third embodiment of the same device.

FIG. 6 is a configuration diagram of pressure adjusting means in a fourth embodiment of the same device.

FIG. 7 is a system configuration diagram showing a state when fine bubbles are generated in the bubbly water flow generator according to the fifth embodiment of the present invention.

FIG. 8 is a system configuration diagram showing a state of the apparatus when jet bubbles are generated.

FIG. 9 is a system configuration diagram showing a state when fine bubbles are generated in the bubbly water flow generator according to the sixth embodiment of the present invention.

FIG. 10 is a system configuration diagram showing a state of the apparatus when jet bubbles are generated.

FIG. 11 is a system configuration diagram showing a state when fine bubbles are generated in the bubbly water flow generator according to the seventh embodiment of the present invention.

FIG. 12 is a system configuration diagram showing a state of the apparatus when jet bubbles are generated.

FIG. 13 is a system configuration diagram showing a state when fine bubbles are generated in a bubbly water flow generator according to a conventional example.

FIG. 14 is a system configuration diagram showing a state of the apparatus when jet bubbles are generated.

[Explanation of symbols]

16 Circulation pump 17 bathtub 18 Micro Bubble Generation Means 22 ejector 23 Bypass circuit 24 two-way valve (flow path opening / closing means) 25 Flow rate adjusting valve (flow rate adjusting means) 41 Bypass water discharge part

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-5-212083 (JP, A) JP-A-3-218759 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61H 23/00

Claims (8)

(57) [Claims] 1. A water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. An ejector provided in the bypass circuit, the ejector having a water suction section for inflowing return water from the bathtub;
A flow path opening / closing means provided in the bypass circuit, a flow rate adjusting means provided in the bypass circuit for adjusting the pressure of the bypass water discharge part, and a bypass water discharge part for discharging water flowing through the bypass circuit to the bath. A bubble generator equipped with. 2. A water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. Provided in the bypass circuit, an ejector provided in the bypass circuit for flowing in return water from the bathtub, an ejector having a nozzle for ejecting the sucked water, and a diffuser for passing the water ejected from the nozzle, and the ejector provided in the bypass circuit A flow path opening / closing means, a pressure adjusting means provided in the ejector for adjusting the pressure of the bypass water discharge part, and a bypass water discharging part for discharging the water flowing through the bypass circuit to the bathtub. A bubble generating device comprising the diffuser and the nozzle that is movable with respect to the diffuser to adjust the pressure. 3. A water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. Provided in the bypass circuit, and an ejector provided in the bypass circuit, the ejector having a water suction part for inflowing return water from the bathtub, a nozzle for discharging the sucked water, and a diffuser for passing the water discharged from the nozzle, and the ejector provided in the bypass circuit. A flow path opening / closing means, a pressure adjusting means provided in the ejector for adjusting the pressure of the bypass water discharge section, and a bypass water discharging section for discharging the water flowing through the bypass circuit to the bath. A bubble generating device comprising a nozzle and the diffuser that is movable with respect to the nozzle to adjust the pressure. 4. A water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. Provided in the bypass circuit, and an ejector provided in the bypass circuit, the ejector having a water suction part for inflowing return water from the bathtub, a nozzle for discharging the sucked water, and a diffuser for passing the water discharged from the nozzle, and the ejector provided in the bypass circuit. A flow path opening / closing means, a pressure adjusting means provided in the ejector for adjusting the pressure of the bypass water discharge section, and a bypass water discharging section for discharging the water flowing through the bypass circuit to the bath. A bubble generator that adjusts the pressure by changing the length of the diffuser. 5. A water tank, fine air bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. , An ejector provided in the bypass circuit, which has a water suction part for inflowing return water from the bath, a bypass water discharge part for discharging the water flowing in the bypass circuit to the bath, and a pressure for the bypass water discharge part. A bubble generating device comprising a pressure sensor for detecting and a flow rate adjusting means for receiving a signal from the pressure sensor and adjusting a flow rate of the bypass circuit. 6. A water tank, fine air bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. An ejector provided in the bypass circuit, the ejector having a water suction part for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, and a bypass for discharging water flowing in the bypass circuit to the bath A bubble generating device comprising: a water discharger; a pressure sensor for detecting the pressure of the bypass water discharger; and a pump controller that receives a signal from the pressure sensor and controls the rotation speed of the circulation pump. 7. A water tank, a fine bubble generating means provided in the water tank, a circulation pump for circulating the water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. An ejector provided in the bypass circuit, the ejector having a water suction part for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, and a return pipe for sending return water from the bath to the ejector And a second circulation pump provided in the return pipe, and a bubble generating device provided with a bypass water discharge part for discharging water flowing through the bypass circuit to the bath. 8. A water tank, fine air bubble generating means provided in the water tank, a circulation pump for circulating water in the water tank, and a bypass circuit having both ends connected between a discharge side and a suction side of the circulation pump. An ejector provided in the bypass circuit, the ejector having a water suction part for inflowing return water from the bath, a flow path opening / closing means provided in the bypass circuit, and a return pipe for sending return water from the bath to the ejector A second circulation pump provided in the return pipe, a bypass water discharge part for discharging the water flowing in the bypass circuit to the bath, a pressure sensor for detecting the pressure of the bypass water discharge part, and the pressure A bubble generation device comprising a pump control device that receives a signal from a sensor and controls the rotation speed of the second circulation pump.